<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.jbxue.com/" />
<title>脚 本 学 堂</title>
<style type="text/css">
.test_box {
    width: 100px; 
    min-height: 100px; 
    max-height: 200px;
    _height: 100px; 
    margin-left: auto; 
    margin-right: auto; 
    padding: 3px; 
    outline: 0; 
    border: 1px solid red; 
    color: red;
    font-size: 12px; 
    word-wrap: break-word;
    overflow-x: hidden;
    overflow-y: auto;
    _overflow-y: visible;
    background: transparent;
}
</style>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>

</head>
<body style="background-image: url(images/a1.png)">
<div class="test_box" contenteditable="true"><br /></div>
</body>
</html>